G. D. Illingworth

The evolution of z=7-8 galaxies from IRAC observations of the deep/wide-area WFC3/IR ERS and ultradeep WFC3/IR HUDF (2009)

Labbe, I., Gonzalez, V., Bouwens, R. J., Illingworth, G. D., Franx, M., Trenti, M., ...

We investigate the Spitzer/IRAC properties of 36 z~7 z-dropout galaxies and 3 z~8 Y-dropout galaxies derived from deep/wide-area WFC3/IR data of the Early Release Science, the ultradeep HUDF09, and...

UV Continuum Slope and Dust Obscuration from z ~ 6 to z ~ 2: The Star Formation Rate Density at High Redshift (2009)

Bouwens, R. J., Illingworth, G. D., Franx, M., Meurer, G. R., Conselice, C. J., ...

We provide a systematic measurement of the rest-frame UV continuum slope β over a wide range in redshift (z ~ 2-6) and rest-frame UV luminosity (0.1 L^*_(z = 3) to 2 L^*_(z = 3)) to improve...

Ultradeep IRAC Observations of sub-L* z~7 and z~8 Galaxies in the HUDF: the Contribution of Low-Luminosity Galaxies to the Stellar Mass Density and Reionization (2009)

Labbe, I., Gonzalez, V., Bouwens, R. J., Illingworth, G. D., Oesch, P. A., Van Dokkum, P. G., ...

We study the Spitzer IRAC mid-infrared (rest-frame optical) fluxes of 14 newly WFC3/IR-detected z=7 z_{850}-dropout galaxies and 5 z=8 Y_{105}-dropout galaxies. The WFC3/IR depth and spatial...

Very blue UV-continuum slopes of low luminosity z~7 galaxies from WFC3/IR: Evidence for extremely low metallicities? (2009)

Bouwens, R. J., Illingworth, G. D., Oesch, P. A., Trenti, M., Stiavelli, M., Carollo, M., ...

We use the ultra-deep WFC3/IR data over the HUDF and the Early Release Science WFC3/IR data over the CDF-South GOODS field to quantify the broadband spectral properties of star-forming galaxies at...

Structure and Morphologies of z~7-8 Galaxies from ultra-deep WFC3/IR Imaging of the HUDF (2009)

Oesch, P. A., Bouwens, R. J., Carollo, C. M., Illingworth, G. D., Trenti, M., Stiavelli, M., ...

We present a first morphological study of z~7-8 Lyman Break galaxies (LBGs) from Oesch et al. 2009 and Bouwens et al. 2009 detected in ultra-deep near-infrared imaging of the Hubble Ultra Deep field...

UV Continuum Slope and Dust Obscuration from z~6 to z~2: The Star Formation Rate Density at High Redshift (2009)

Bouwens, R. J., Illingworth, G. D., Franx, M., Chary, R-R., Meurer, G. R., Conselice, C. J., ...

We provide a systematic measurement of the rest-frame UV continuum slope beta over a wide range in redshift (z~2-6) and rest-frame UV luminosity (0.1-2L*) to improve estimates of the SFR density at...

QSO Coronagraphy and Ramp Imaging in the ACS GTO Programs (2009)

A. M. Koekemoer, P. Goudfrooij, L. L. Dressel, A. R. Martel, H. C. Ford, G. D. Illingworth, ...

Abstract. We briefly discuss the processing and reduction steps of imaging data acquired in two minor modes of ACS as part of the ACS GTO programs: HRC coronagraphy of the luminous quasar 3C 273 and...

z~8 galaxies from ultra-deep WFC3/IR Observations over the HUDF (2009)

Bouwens, R. J., Illingworth, G. D., Oesch, P. A., Stiavelli, M., Van Dokkum, P., Trenti, M., ...

We utilize the newly-acquired, ultra-deep WFC3/IR observations over the HUDF to search for star-forming galaxies at z~8-8.5, only 600 million years from recombination, using a Y_{105}-dropout...

z~7 Galaxies in the HUDF: First Epoch WFC3/IR Results (2009)

Oesch, P. A., Bouwens, R. J., Illingworth, G. D., Carollo, C. M., Franx, M., Labbe, I., ...

We present a sample of 16 robust z~7 z_{850}-dropout galaxies detected by the newly installed WFC3/IR camera on the Hubble Space Telescope. Our analysis is based on the first epoch data of the HUDF09...

Stellar Masses of Lyman Break Galaxies, Lyman Alpha Emitters and Radio Galaxies in Overdense Regions at z=4-6 (2009)

Overzier, R. A., Shu, X., Zheng, W., Rettura, A., Zirm, A., Bouwens, R. J., ...

We present new information on galaxies in the vicinity of luminous radio galaxies and quasars at z=4,5,6. These fields were previously found to contain overdensities of Lyman Break Galaxies (LBGs) or...

The HST Medium Deep Survey: galaxy morphology at high redshift (1996)

Griffiths, R., Ratnatunga, K. U., Casertano, S., Im, M., Neuschaefer, L. W., Ellis, R., ...

With HST and WFPC2, galaxies in the Medium Deep Survey can be reliably classified to magnitudes I-814 less than or similar to 22.0 in the F814W band, at a mean redshift (z) over bar similar to 0.5....